Nitin A Kamble wrote:
> Hi Avi,
> Attached is the patch to implement instructions:
> inc reg
> opcode: 0x40 - 0x47
> Please apply.
>
> @@ -1390,6 +1393,22 @@ pop_instruction:
> _eip = ctxt->vcpu->rip;
> }
> switch (b) {
> + case 0x40 ... 0x47: /* inc reg */
> + dst.ptr = (unsigned long *)&_regs[b & 0x7];
> + dst.val = *dst.ptr;
> + switch (op_bytes) {
>
Too much indentation here?
> + case 2:
> + *(u16 *)dst.ptr = (u16)dst.val + 1;
> + break;
> + case 4:
> + *dst.ptr = (u32)dst.val + 1;
> + break; /* 64b: zero-ext */
> + case 8:
> + *dst.ptr = dst.val + 1;
> + break;
> + }
> + no_wb = 1; /* Disable writeback. */
> + break;
> case 0xa4 ... 0xa5: /* movs */
> dst.type = OP_MEM;
> dst.bytes = (d & ByteOp) ? 1 : op_bytes;
>
Why are we disabling writeback instead of using the regular writeback
mechanism? Shouldn't just setting dst.val be sufficient?
--
Do not meddle in the internals of kernels, for they are subtle and quick to
panic.
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